AMERICAN DIPTERA. 261 



BL,EPII4ROPRO€TA Loew. 

 Insects resembling Brachystoma in everything but the noninfla- 

 tion of the abdomen and the neuration of the wing. In this genus 

 the first sLibinarginal cell is squarely cut off by a cross-vein connect- 

 ino- the second and the third longitudinal veins. 



...2 



The th ree basal cells subeqiial 



Second hasal and anal cells long binu.n.n.i»* Loew. 



o Base of anterior tarsi fuscous, of middle tarsi badius serraliila Loew. 



Anterior and middle tarsi black nigrimaiia Loew. 



Blepharoprocta nigrimana Loew. 

 Cent, ii, 17. , .^ ,,. 



Head black, shining. Antennae black. Face very narrow, white-polhnose. 

 Proboscis pale yellow. Thorax black, shining, bare, the lower half of the pleui-se 

 white-uoUinose. Scutellum and abdomen black ; venter yellow. Hypopygmm 

 subglobose, black, apically with some erect pile pale yellowish. (ox* and legs 

 slender, yellowish. Anterior femora below near the apex with sn>all black 

 spines- middle femora not thicker than the others, pure yellow ; posterior femora 

 fuscous, except the base and very apex. Anterior tibia, increasing ,n yellow 

 color towards the apex, posterior fuscous, pale below near the apex. Anterior 

 tarsi black, posterior dark fuscous, black at tip. Wings cinerascent, narrow 

 stigma obsolete, hairs of the hind margin not bent back ; first submarginal cell 

 closed ; the three basal cells subequal. 2.7 mm. 

 Illinois (Le Baron). 



Blepharoprocta biiiummiis Loew (Figs. 91. 92). 



Cent, ii, 16. , n • u *v,;..^ 



Head black, shining. First two joints of the antenna pale yellowish, thud 

 joint black, the terminal seta black. Face very narrow, white-polhnose. Pro- 

 boscis pale yellow. Thorax black, shining, bare, hind angles dark fuscous lower 

 half of the pleuriE white-pollinose. Scutellum black ; abdomen black, shining, 

 bare- venter yellowish; hypopygium globose, black, apically provided with a 

 bundle of pale yellow hairs. Coxse and legs slender, pale yellow. Anterior 

 femora below near the apex with very small black spines; middle femora a litt e 

 thicker than the others, curved, below near the base with rather sparse white 

 hairs, behind-before the apex-with very closely-placed hairs; hind femora 

 more slender on the outer half, infuscated. Anterior tibi« simple, basal half of 

 the middle tibia, subfuscous, at the apex suddenly thickened and provided with 

 long pale vellowish hairs; posterior tibia curved, fuscous, the extreme apex 

 paler The first three joints of the front tarsi decreasing in length, yellow, the 

 iast two black, dilated, on both sides short black-pilose, each with a silvery dot 

 below, the outer one larger; of the middle tarsi the first three joints a.e yellow 

 the last two black ; the hind tarsi have the last joint black, the next to the last 

 dark fuscous, and the others yellow. Halteres white. Wings long, narrow, 

 wedge-shaped, subcinerascent, stigma obsolete, posterior margin with long re- 

 tiexed hairs in part; first submarginal cell closed; the two anterior basal cells 

 much shorter than the anal. 3 mm. 

 District of Columbia. 



^^,TTTr AUGUST, 1902 



TRANS. AM. ENT. SOC, XXVIII. 



